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E. MAKIN, J1". STEAM BOILER FOR MARINE ENGINES.

Patented Mar. 1, 1898.

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E. MAKIN,IJ r. STEAM BOILER FOR MARINE ENGINES.

No. 599,854. Patented Mar. 1, 1898.

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B. MAKIN, Jr. STEAM BOILER FOR MARINE ENGINES.

Patented Mar. 1, 1898.

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THE Monms PETERS on, Pnorouma, WASHINGTON. n, t:

UNITE STATES PATENT OFFICE. I

EDWARD MAKIN, JR, OF MANCHESTER, ENGLAND.

STEAM-BOILER FO R MARINE ENGINES.

SPECIFICATION forming part of Letters Patent No.59e,854, dated March 1, 1898. Application filed May 20, 1897. Serial No. 637,398. (No model.) Patented in England August 6,1896, lie-17,358.

To all whom it may concern:

Be it known that I, EDWARD MAKIN, J r., a subject of the Queen of Great Britain, and a resident of 40 New Brown street, Manchester, in the county of Lancaster, England, have invented certain new and useful Improvements in Steam-Boilers for Marine Engines, Locomotive, Tramway, and Road Engines and the Like, (for which I have obtained Letters Patent in Great Britain, No. 17,358, bearing date August 6, 1896,) of which the following .is a specification.

My invention relates to improvements-in steam-boilers of. the type in which the furnace-gases usually pass through a series of tubes; and the chief objects of my improvements are to enable steam to beraised more quickly than in an ordinary boiler of this type, to prevent formation of scale, to superheat the steam, and generally to increase th power and efficiency of the boiler.

In applying my improvements to a boiler of the type indicated I substitute for some or all of the ordinary smoke-tubes any suitable number of tubes or lines of a larger diameter-namely, of such a size that I can apply in each tube or flue a steam-generating apparatus, consisting of a series of any convenient number of hollow-walled vessels of any suitable shape or form, but preferably a series of conical hollow-walled shells arranged, preferably, with their larger ends toward the furnace and preferably with the larger end of each shell overlapping the smaller end of the previous one, but without touching it, so as to leave a passage for the furnace-gases between, around, and through the shells, in order that as large a surface as possible may be exposed to the action of the heated gases.

The hollow-walled vessels are supplied with water from the boiler or from any convenient feed, and the vessels are preferably all connected together by-circulating pipes or passages and to the steam or water space of the boiler or steam-separatin g vessel. In the same flue or in a separate flue I arrange similar apparatus for the purpose of super-heating the steam, which is supplied at the inlet end from the steam-space in'theboiler or steamsepa rating vessel and is delivered at the outlet end of the superheating apparatus to the cylinder of the engine or elsewhere, as required.

In the accompanying three sheets of draw ings, Figures 1 and 3 are longitudinal sectional elevations of a marine or similar boiler fitted with my improved steamgenerating apparatus, Fig. 1, and steam-superheating apparatus, Fig. 3; and Fig. 2 is a front elevation of the same. Fig. 4 is a longitudinal sectional elevation of a locomotive or similar boiler fitted with my improved steam-generating and steam-superheating apparatus. Figs. 5 and 6 are end elevations of the same, and Fig. 7 is a sectional detail of the preferred form of hollow-walled shells employed in both types of boilers.

Referring first to the marine type of boiler illustrated by Figs. 1 to 3, a designates the shell of the boiler; 11 b, the two furnace-fines, which I substitute for all (or in this case some) of the small smoke-tubes b; c, fire-bars d, the bridge, and e the two series of hollow-walled conical shells. (Shown also in the sectional detail, Fig. 7.)

The series ofhollow-walled cones e in the left-hand flue 1) (shown in the longitudinal section, Fig. 1,) are for steam-generation and are supplied with water through a feed-pipe f, connected to a mud-drum g, in communication through a pipe h with the boiler a. Each ofthe hollow-walled cones cis connected by branches to the feed-pipe f and also to a discharge or delivery pipe 71, which is connected to the boiler, preferably at or about the Water-level. In like manner the series of hollow-walled cones e in the right-hand fiue 1) (shown in section, Fig. 3) are for steamsuperheating and are supplied with steam through a pipe j, connected to the steam-space of the boiler a. Each of the cones e is connected by branches to the steam-supply pipe j and also to a steam-delivery pipe 70, by which the steam is conveyed to the engine-cylinder. (Not shown inthe drawings.) In this arrangement some of the heated gases from the furnace pass through the ordinary smoketubes 1), but the remainder and greater portion pass along the large fines 6, between, around the outsides, and through the space inside the hollow-walled vessels e,'within the walls of which in one case steam is rapidly generated and in the other case the steam is superheated. I

As already stated, I may dispense with all the smoke-tubes b, or I may retain part, as shown, or I might retain all and place the series of hollow-walled vessels 0 in the fire-box, or as a further alternative I might dispense with some or all of the smoke-tubes and place the hollow-walled vessels 6 in the fire-box as well as in the lines D.

The arrangement of boiler of the locomotive type illustrated by Figs. 4 to 7 is practically the same as that already described; but instead of placing the two series of 1101- low-wallcd cones c in separate fiues they are in this arrangement preferably placed in one and the same flue b. Also in place of having a separate mud-drum g the space a is used as a sediment or depositing chamber and a blow-off cock on applied thereto, the feedpipe f being preferably connected to the side of the boiler immediately above the space a. The remaining parts correspond with those bearing similar letters and which have already been described with reference to Figs. 1 to 3.

As already stated, I may employ hollowwalled vessels of any other suitable shape or form, and I may connect each vessel separately to the water-space of the boiler below and to the steam or water space of the boiler above.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim, and desire to secure by Letters Patent of the United States, 1s

In combination with the boiler, a steamgenerator comprising a series of hollow-walled cones with pipe connections, and a steamsuperheater comprising a series of hollowwalled cones with pipe connections, said generator and superheater being confined within a fire tube or tubes, substantially as described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

EDWARD AKIN, JUNIOR.

"Witnesses:

S. D. GILLETT, HERBERT R. ABBEY. 

